( )是指人触电后自己能摆脱电源的最大电流,交流约10mA,直流为50mA。
A.感知电流
B.危险电流
C.致命电流
D.摆脱电流
参考答案:D
President Xi Jinping demanded that the environmental problems ______ paid special attention to.
A.referred to being
B.referred to be
C.refer to being
D.refer to be
清洁广告牌时用棉丝蘸(),擦拭底板,去除其上的油迹、污迹。
A.水
B.柴油
C.汽油
D.稀料